1.SET GLOBAL group_replication_poll_spin_loops= 10000;
2.flow control的作用
3.压缩优化
STOP GROUP_REPLICATION;
SET GLOBAL group_replication_compression_threshold = 2097152;
START GROUP_REPLICATION;
4.碎片优化
STOP GROUP_REPLICATION;
SET GLOBAL group_replication_communication_max_message_size= 5242880;
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START GROUP_REPLICATION;